Method of and apparatus for beating paper pulp



June 21, 1932- W. N SHERWOOD 1,363,808

METHOD OF AND APPARATUS FOR BEATING PAPER PULP Filed Feb. 9, 1931 2 Sheets-Sheet Patented June 21, 1932 UNITED STATES WALTER N. SHERWOOD, OF NORTH HOOSICK, NEW YORK METHOD OF AND APPARATUS FOR BEATING PAPER PULP Application filed February 9,4931. Serial No. 514,548.

My invention relates to a method of and apparatus for beating pulp.

In accordance with my invention, apparatus is provided, including a chamber within which is mounted a rotary beating roll, co.-

acting with the usual bed plate. The pulp or stock is supplied to the lower portion of the beating roll upon one side thereof, and is carried upwardly by the beating roll, due to the action of centrifugal force, and is rapidly thrown or projected from the upper portion of beating roll, and passes through the air, to a point above and upon the intake side of the beating roll, and is collected within a receptacle or trough and given a whirling or rotating mixing action therein. After this mixing action, the pulp or stock is discharged into the tub and is circulated therethrou h and again supplied to the lower portion of t e beating roll. The whirling or rotating stock is forcibly or violently thrown or discharged into the stock at the intake end of the channel. The tub is, preferably, provided near its intake end with a compartment, the outer side of which is straight, and the inner si e of which is inclined longitudinally toward t e center, for the purpose of providing a contracted opening for this section.

The construction is such that the lighter portion of the stock tending to travel faster at the inner side, of the tub section is somewhat slowed down, and deflected laterally and mixed with the heavier portion of the stock, which tends to travel at a slower rate of speed near the outer portion of the tub section. The result is that the entire mass is made to travel at substantially the same speed. This intake tub section discharges through the contracted opening into a transverse tub section, and the inner wall of this transverse tub section is inclined longitudinally, for laterally deflecting the stock and effecting a mixing of the same. This end tub section discharges through a contracted opening into an outlet tub section, increasing in width toward its discharge end, thereby effecting lateral expansion of the pulp, for mixing, and afi'ording an abundant supply of the pulp to the beater roll. Means are also provided for extracting the pulp during the operation of the apparatus, so that the apparatus functions as a continuous beater.

In the accompanying drawings, forming a part of this specification, and in which like numerals are employed to designate like parts throughout the same,

Figure '1 is.a plan view of a pulp beating en ine embodying my invention,

. igure 2 is a longitudinal section taken on line 22 of Figure 1,

Figure 3 is a transverse section taken on line 33 ofFigure 1, I

Figure 4 is a similar View, taken on line 4'4= of Figure 1,

Figure 5 is a detail section through removable apertured plugs,

Figure 6 is a' detail'section taken on line 66 of Figure 2, showing slashing blades,

Figure 7 is an end elevation of the same,

- Figure 8 is a perspective .view of one of the slasher blades.

Figure 9 is a vertical section taken on line 99 of Figure 3,

Figure 10 is a similar view taken on line 1010 of Figure 3, showing the pulp elevated deflector in end elevatlon,

Figure 11 is a transverse section taken on line 1111 of Figure 5,

Figure 12 is a similar view taken on line 12-12 of Figure 5,

Figure 13 is a similar view taken on line 1313 of Figure 5.

In the drawings, wherein, for the purpose of illustration, is shown a preferred embodiment of my invention, the numeral 10 designates a beating chamber, within which is mounted a rotary beating roll 11, having spaced radial blades 12, forming-relatively small buckets 13. This beating roll is supported and driven by a shaft 14, journaled in bearings 15, which are, preferably, vertically adjusted by the usual means. The shaft 14 is driven by a pulley 16, receiving its rotation from any suitable prime mover. The beating chamber 10 has a bottom 17, having a circularly curved face 17 extending upwardly from a bed plate 18. This circu arly curved face is disposed near the heating drum and spaced therefrom. The bot- -tom'17 is rovided in advance of the bed plate 18, with an inclined surface 19, having an abruptly inclined shoulder 20, adjacent to the bed late 18. The function of the abruptly inc ined shoulder 20 is to uide the stock directly beneath the bottom the heating roll, in close proximity to the bed plate 18.,

The numeral designates slasher elements, which have shanks 21, screw-threaded within-openings in the lower portion of a cover 21. These slasher elements may be arranged near the elevation of the center of rotation of the beater drum, or slightly above such elevation. The slasher elements are, preferably, disposed in horizontal rows and the slasher elements in each row are spaced, and the slasher elements in the several rows are arranged in staggered relation. Each slasher element embodies downwardly converging sides 22 affording a lower cutting edge 23', and atop 24, which inclines toward the free end of the element, so that any stock tending to accumulate thereon will slide from the same.

The top of the chamber 10 is closed by a cover 21, extending upwardly above the beating roll, at'a tangent of from the horizontal. This cover is longitudinally curved in a vertical plane, and extends to a point remote fromthe same side of the beating roll, with the inclined surface 10. The chamber 10 has sides 10', extending upwardly to engage with the cover 21, and one of these sides is, preferably, provided with vent openings or holes 22', for releasing the pressure. The cover 21 is, approximately, inverted V-shaped in cross-section, for the major portion of its length, whereby its inner surface functions as a trough, for guiding the stock, and effecting lateral movement of the same, for mixing. The inverted V-shaped cross-section of the cover 21 gradually decreases toward its opposite ends and terminates in flat end portions 22 and 23 Figures 11, 12 and 13. The cover 21 is suitably fastened to the chamber 10. a

The numeral 24 designates a tub, including an inlet tub section 25, an intermediate or transverse tub section 26, and an outlet tub section 27. The numeral 28 designates the mid-feather and 29 a partition, forming with the mid-feather and extracting chamber 30, having an outlet opening 31 in its bottom, discharging into a pipe 32. The intake tub section 25 receives the stock after treatment by the beating roll, in a manner to be described, and this stock is violently discharged into the stock within the intake tub section 25, and the stock collected within the intake tub section 25 gravitates down an incline 33, having upper and lower inclined surfaces 34-35, as shown.

The numeral 36 designates a curved filler block at the corner of the tub section 25. The

numerals 37 and 38 designate a pair of angu- The extractor chamber also embodies a partition or plate 40, which is inclined longitudinally of the tub section 26, according a contracted opening 41. The outer side of the tub section 26 is, preferably, straight, as shown at 42. A filler 43 is, preferably, arranged between the partitions 38 and 40.

The construction of the inner wall or side of the passage 26 is such that it produces a lateral shifting of the stock, and expansion and contraction, effecting a mixing of the same. The opening 41 discharges into the outlet tub section 27, the inner wall of which is formed by the partition 29, partition 43, and the end of the partition 40. This tub section 27 increases in width, forwardly, for effecting an expansion of the stock, for producing further mixing and also for providing an abundant flow of the stock to the beating roll. As clearly shown in Figure 2, the outlet of the tub section 27 leads directly to thespace 44. beneath the intake side of the beating roll 11.

The numeral 45 designates a mixing chamber, arranged forwardly of and spaced a suitable distance from the beating roll 11. This mixing chamber has an inner side 46. The numeral 46 designates a filler arranged at the bottom of the side 46, and a short deflector 47' is arranged at the end of the filler 46. The filler 46' is transversely concaved and the deflector 47 is also transversely concaved, and is longitudinally curved or inclined in an upwardly direction toward its discharge ends and serves to lift or elevate the stock as it is rapidly discharged from the mixing chamber, as will be described. This prevents the stock rapidly discharged into the tub section 25 from tending to sink in the collected stock.

The top of the mixing chamber is open, and a rotatable cylinder 47 is, preferably, arranged above and adjacent to the side 46. The side and cylinder 47 constitute a high partition between the mixing chamber and beating roll. The partition embodying the side 46 and roll 47, preferably, extends upwardly to about the elevation of the top of the beating roll 11, while this elevation may vary, depending upon the character of'the stock treated. This affords a large gap upon the forward side of the beating roll and the beating roll must, therefore, be rotated at a sufficiently high speed to cause the stock to be thrown over this high partition, whereby the stock becomes suspended in the air. While it is within limits.

preferred to have the partition embodythe roll 47, some degree of success is obtainable by dispensing with the roll and having the side 46 continued up to the point occupied by the top of the roll. The cylinder 47 is free to rotate in either direction, and its function is to prevent the stock from passing back to the beating roll, when the beating roll is operating at normal high speed, and, further, as a guiding means for the lodgment stock when the beating roll is rotating relatively slower, when starting or stopping its rotation. Under these conditions, the cylinder 47 will guide the lodgment stock either into the mixing chamber or back into the space 44. The outer side of the mixing chamber embodies an upper, vertically inclined wall 47 and a lower vertically inclined wall 48, these walls converging toward each other. The lower inclined wall 48 leads to the bottom 49, of the mixing chamber, and 50 designates a filler, curved in cross section. It is, thus, seen that the sides and bottom of the mixing chamber embody angularly disposed sections, effecting a more perfect mixing. The bottom wall 49, of the mixing chamber is inclined longitudinally toward the intake end of the tub section 25, and satisfactory results' are obtainable by inclining the same at an angle of 24 to 30 from the horizontal. The walls 47' and 48 embody horizontall angularly disposed wall sections 47, 47" an 47 and 48 48 and 48, respectively. The wall sections 4'7 and 48 are approximately one-half the length of the cylinder 47.

The wall 48 is provided with extractor openings 54, arranged to discharge into the extractor chamber 30. These openings may be made in any desired size, and I contemplate regulating the size of these openings by forming the same of the maximum required size, and then reducing their size by inserting apertured plugs 55, therein. In a similar manner, the wall section 48 is provided with openings 56, for increasing the ex tracting capacity and these openings 56 may receive the plugs 55. The openings 56 discharge into a tray 57, leading into the extracting chamber 30.

The operation of the beating engine is as follows:

The tub 24 is suitably filled with the stock, preferably, to an elevation slightly beneath its top, and the mixing chamber 45, during the normal rotation of the beater, is practically filled with the stock, and the beating chamber 10 is also filled with stock, ordinar ly. to an elevation above the axis of rotation of the beating drum. The beating drum is rapidly rotated in the Figure 2, and I have found that satisfactory results are obtainable by rotating this drum at from 2500 to 2800 peripheral feet per minute, although the speed of rotation may be varied By the rapid rotation of the direction of the arrow,

neath the drum. This stock is projected from the drum in the form of a flat sheet andhas contact with the flat surface 22, of the cover 21.

Thisfiat sheet of stock now travels into the inverted V-shaped portion of the cover and is shifted laterally and contracted; thereby efi'ecting a mixing of the stock. As the stock approaches the flat surface 23 of the cover, it is gradually spread out or flattened, producing an expanding and mixing action, and it is again converted into a fiat sheet when engaging the fiat surface 23. This stock is now thrown against and travels upon the outer side of the mixing chamber 45, and the inclined end wall sections 47, 47", 47; and 48, 48", 48, serve to narrow or contract the mass, changing the same from the flat stream. The, inclination of the walls 47 and 48 upon the horizontal line, effects a mixing action of the stock and guides the same to the outer side of the bottom 49. The stock finally discharges into the bottom of the mixing chamber, which is more or less filled with the stock and-rapidly travels transversely through the mixing chamber, causing the stock therein to partake of a rolling motion upon an axis extending longitudinally of the mixing chamber, while the stock is rapidly travelling longitudinally of the mixing chamber, for discharging from the same into the tub section 25. There is, therefore, produced a transverse rotary under cross current at a right angle to the longitudinal current of the pulp, as it discharges from the mixing chamber. The pulp which is suitably treated for extracting, passes into the extracting chamber 30 and may be removed therefrom, whereby the engine continues in operation.

The stock is rapidly discharged from the mixing chamber and upon enteringthe' tub section 25, violently plows or agitates the stock collected therein. The stock collected 1n the tub section 25 is caused to circulate through the top by the action of the incline 33, and the propelling force of the stock which r is rapidly discharging into the same. The

stock is treated or mixed into the several tub sections 25-26-27, as hereinbefore explained.

It is to be understood that the form of my invention herein shown and described, is to be taken as a preferred example of the same, and that various changes in the shape, size and arrangement of parts, may be resorted to,

without departing from the spirit of my invention, or the scope of the subjoined claims. Having thus described my invention, what I claim is:

1. The method of beating paper pulp in the presence of a liquid, comprising circulat- 2 ing the mass through a passage, passing the mass beneath and upon one side of a'beatin-g roll, driving the roll at a hi h speed and thereby causing the mass to e thrown by centrifugal force into the air from the opposite side of the beating roll, and guiding the thrown mass in spaced relation from the beating roll over and uponthe first-named side of the beating roll, collecting the mass and thoroughly mixing the same.

2. The method of beating paper pulp in the presence of a liquid, comprising circulating the mass through a. passage, withdrawing the same from one end of the-passage and passing the pulp beneath and upon one side of a rotary beating roll, driving the roll at a high speed and thereby causing the mass to be thrown by centrifugal force into the air from the opposite side of the beating roll, guiding the thrown mass in spaced relation from the beating roll over the beating roll and upon the first-named side of the same while varying the depth of the thrown mass during the guiding action, collecting the mass thus treated and thoroughly mixing the same.

3. The method of beating paper pulp in the presence of a liquid, comprising circulating the mass through a passage, withdrawing the same from one end of the passage and passing the mass beneath and upon one side of a rotary beating roll, driving the roll at a high speed while in contact with said mass and thereby causing the mass to be thrown by centrifugal force into the air from the opposite side of the beating roll in the form of a substantially fiat sheet in spaced relation from the beating roll, guiding the thrown sheet over the beating roll and upon the firstnamed side of the same while varying the Width and depth of the sheet, collecting the mass thus treated, mixing the same, and introducing the same into the intake end of said passage.

4. The method of beating paper pulp in the presence of a liquid, comprising circulating the mass through a passage, withdrawing the mass from one end of the passage and passing the same beneath and upon one side of a rotary beating roll, driving the roll at a high speed while in contact with the mass, and thereby causing the mass to be thrown by centrifugal force into the air from the opposite side of the beating rollin the form of a generally flat sheet, guiding the thrown sheet over the beating roll and upon the firstnamed side of the same while maintaining the sheet spaced from the beating roll and varying the width and depth of the sheet, collecting the mass thus treated and imparting thereto a rotary motion, and discharging the mass in a direction longitudinally of its axis of rotation into the opposite end of the passage.

5. The.method of beating paper pulp in the presence of a liquid, comprising circulating the mass through a passage,'withdraw mg the mass from one end of the passage and passmg the same beneath and upon one side of a rotary beating roll, driving the roll at a hlgh speed while in contact with the mass and thereby causing the mass to be thrown by centrifugal force into the air from the opposite side of the beating roll, guiding the thrown mass over the beating roll and upon the first-named side of the same while maintaining the same spaced from the beating roll, collecting the mass thus treated and imparting thereto a rotary motion, and discharging the mass in a direction longitudinally of its axis of rotation into the opposite end of said passage.

6. In the method of beating-paper pulp in the resence' of a liquid, comprising the steps passing the liquid mass beneath and upon the take-up side of the rotary beating roll of a paper pulp engine, driving the roll at a high speed while in contact with the mass and thereby causing the mass to be thrown by centrifugal force into the air from the discharge side of the beating roll while guiding the thrown suspended mass over and back upon the take up side of the beating roll and collecting the mass thus guided.

7. The method of beating paper pulp in the presence of a liquid, comprising circulating the mass through a passage, withdrawing the mass from the passage and passing the same beneath and upon the take up side of a rotary beating roll of a paper pulp engine, driving the roll at a high speed and thereby causing the mass to be thrown by centrifugal force into the air from the discharge side of the beating roll while guiding the thrown suspended mass over and back upon the take up side of the beating roll, collecting the mass thus treated and imparting thereto a rotary motion, and discharging the mass in a direction longitudinally of its axis of rotation back into said passage.

8. The method of beating paper pulp in the presence of liquid, comprising circulating the mass through a passage, withdrawing the mass from the passage and passing the same beneath and upon the take up side of the beating roll of a paper pulp engine, driving the roll at a high speed and thereby causing the mass to be thrown by centrifugal force into the air from the discharge side of the beating ro-ll while guiding the thrown suspended mass over and back upon the take up side of the beating roll, collecting the mass thus treated and imparting thereto a rotary motion While varying the length of the rotating mass, and discharging the mass in a direction longitudinally of its axis of rotation back into said passage while imparting thereto a lifting action.

9. In a paper pulp beating engine, a tub having a circulating passage, a beating chamber in communication with one end of the passage, a rotary beating roll arranged within the chamber, a bed plate beneath the beat-ing roll, guide means extending upon one side of 5 the beating roll and above the same to a point beyond its opposite side, said guide means being spaced from the beating roll with a distance between the same increasing toward the forward end of the guide means, said guide means having its end portions flat and its intermediate portion approximately inverted V-shaped in cross-section and decreasing in depth toward the flat end portions, a mixing chamber arranged near and beneath the forward end of the guide means and adapted to receive pulp from the same which is thereby rotated within the mixing chamber, said mixing chamber discharging into the opposite end of said passage.

10. In a paper pulp beating engine, a tub having a circulating passage, a beating chamber in communication with one end of the passage, a rotary beating roll arranged within the chamber, a bed plate beneath the beating roll, guide means extending upon one side of the beating roll and above the same to a point upon the opposite side of the beating roll, said guide means being spaced from the beating roll and increasing in distance from the same from a point upon the first-named side of the roll to a point upon the said opposite side of the roll, and a mixing chamber arranged near and beneath the forward end of the guide means which is positioned to discharge the pulp into the mixing chamber at one side thereof for rotating the pulp within the mixing chamber, said mixing chamber discharging into said passage.

11. In a paper pulp beating engine, a tub having a circulating passage, a beating chamber in communication with the passage, a rotary beating roll within the chamber, a bed plate beneath the beating roll, longitudinally curved guide means extending upon one side of the beating roll and above the same to a point upon the opposite side of the beating roll, said guide means being spaced from the beating roll and increasing in distance from the same from a point upon the first-named side of said roll to a point upon the said opposite side of the roll and extending downwardly toward such forward end, and a mixing chamberarranged near and beneath the forward end of the guide means which is positioned to discharge the pulp into the mixing chamber near one side thereof to rotate the pulp within the chamber upon an axis extending longitudinally of the chamber, said mixing chamber having an opening at one end discharging into said passage and having its bottom longitudinally inclined and extending downwardly toward said discharge openings.

12. In a paper pulp beating engine, a tub having a circulating passage, a beating the forward end of the guide means which is positioned to discharge the pulp into the mixing chamber near one side thereof to ro-- tate the pulp within the chamber upon an axis extending longitudinally of the chamber, said mixing chamber having an opening at one end discharging into the passage and having its bottom longitudinally inclined downwardly toward said discharge opening, and having angularly arranged end portions which serve to vary the length of the rotating mass within the mixing chamber.

13. In a paper pulp beating engine, a tub having a circulatingpassage, a beating chamber in communication with the passage, a rotary beating roll within the chamber, a bed plate beneath the roll, a longitudinally curved guide means extending upon one side of the beating roll and above the same to I a point upon the opposite side of the beating roll, said guide means being spaced from the beating roll and increasing in dis tance from the same toward its forward end, said guide means having its opposite end portions substantially flat and its intermediate portions approximately inverted V-shaped, and a mixing chamber receiving pulp from the guide means and discharging the same into said passage.

14. In a paper pulp beating engine, a tube having a circulating passage, a beating chamber in communication with the passage, a rotary beating roll within the chamber, a longitudinally curved guide means extending upon one side of the roll and above the same to a point upon the opposite side of the beating roll, said guide means being spaced from the beating roll and increasing in distance from the same toward its forward end, a mixing chamber disposed upon the forward side of the beating roll and arranged to receive the pulp from the guide means, and a rotatable cylinder arranged adjacent to the top of the side of the mixing chamber next to the beatin roll.

15. n a paper pulp beating engine, a tub having a circulating passage, a beating chamber in communication with the passage, a rotary beating roll within the chamber, a longitudinally curved guide means extending upon one side of the roll above the same to a point upon the opposite side of said roll, a mixing chamber disposed upon the forward side of the beating roll and arrangedto receive pulp from the guide means, said mixof slashing elements projecting into the beating chamber rearwardly of the bed plate.

17. In a paper pulp beating engine, a tub, partition elements arranged within the tub and forming therewith a circulating passage and an extracting chamber, certain of the partition elements having openings, apertured plugs for insertion within the openings, a rotary beating roll within the chamher, and means to conduct the pulp from the roll back to the passage.

18. In a paper pulp beating engine, a tub having a circulating passage, a beating chamber. in communication with the passage, a rotary beating roll arranged within the chamber, a bed plate beneath the beating roll,

uide means arranged above the beating roll in spaced relation thereto, and extending to points upon opposite sides of the same, a mixing chamber arranged near the forward end of the guide means to receive stock therefrom, and a partition arranged between the mixing chamber and the beating roll and so correlated with the same that the stock is caused to be suspended in the air when thrown over the high partition from the beating roll.

19. In a paper pulp beating engine, a tub having a circulating passage, a beating chamber in communication with the passage, a rotary beating roll arranged within the chamber, a bed plate beneath the beating roll, guide means arranged above the beating roll 1n spaced relation thereto, and extending to points upon the opposite sides of the same, a mixing chamberarranged near the forward end of the guide means to receive stock therefrom, and a high partition arranged between the mixing chamber and beating roll, and ex tending upwardly to an elevation above the top of the beating roll so that the stock becomes suspended in the air when thrown over the partition by said beating roll.

20. In a paper pulp beating engine, a tub having a circulating passage, a beating chamber in communication with the passage, a rotary beating roll arranged within the chamber, a bed plate beneath thebeating roll, pulp guide means arranged above the beating roll in spaced relation thereto and extending above the beating roll from its discharge side back to the take upside, a mixing chamber arranged near the dischargeend of the guide means, said mixing chamber being so associated with the guide means that the susverse area of the same toward a point intermediate of these ends, a beating chamber in communication with the outlet end of one.

longitudinal portion of the circulating passage, a rotary beating roll arranged within the chamber, a bed plate beneath the beating roll, pulp guide means arranged above the beating roll and extending to the rear and forward sides of the same, saidguide means being spaced from the roll and increasing in distance from the rear to the forward side of the same, and a mixing chamber arranged near the forward end of the guide means and discharging into the intake end of the other side portion of the circulating passage.

22. In a paper pulp engine, a tub having a circulating passage including longitudinal portions and a front end portion, means for contracting the transverse area of the front end portion near its intake and outlet ends, a beating chamber in communication with the outlet end of one longitudinal portion of the circulating passage, a rotary beating roll arranged within the chamber, a bed plate beneath the beating roll, pulp guide means arranged above the beating roll and extending to the rear andforward sides of the same, said ide means being spaced from the roll and increasing in distance from the rear to the forward sides of the same, and a mixing chamber arranged near the forward end of the guide means and discharging into the intake end of the other side portion of the circulating passage.

23. In a paper pulp beating machine, a tub, partition elements arranged within the tub and forming therewith a circulating passage and an extracting vchamber, a beating chamber in communication with the passage, a rotary beating roll within the chamber, a bed plate beneath the beating roll, a longitudinally curved guide means extending upon one side of the beating roll and above the same to a point upon the opposite side of the beating roll, said guide means being spaced from the beating roll and increasing in distance from the same from a point upon the first-named side of the roll to a point upon the said opposite side of the roll, a mixin chamber arranged near and beneath the orward end of the guide means which is arranged to discharge the pulp into the mixing chamber us treated, and means near the side thereof remote from the beating roll to rotate the ulp within the mixing chamber, said mixing chamber having an opening at one end discharging into said assage and havin its said remote side provided with openings or the passage of the fine pulp into the extracting chamber.

24. The method of beating paper pulp in the presence of a liquid, comprising circulating the mass through a passage, passing the mass from one end of the passage beneath and upon the take-up side of a beating roll, driving the beating roll at such a high s eed that the mass is thrown by centrifugal orce into the air from the discharge side of the beating roll while guiding the thrown suspended mass over and back upon the take-up side of the beating roll, in a curved path which increases in distance from the upper portion of the take-up side of the roll, collecting the traveling suspended mass and turning its directi on of travel back toward the take-up side of the roll so that the collected mass is ro tated, and discharging the rotating mass into the opposite end of the circulating mass.

25. The method of beating paper pulp in the presence of a liquid, comprising circulating the mass through a passage, passing the mass from one end of the passage beneath and upon the take-up side of a beating roll, driving the beating roll at such a high s eed that the mass is thrown by centrifugal orce into the air from the discharge side of the beating roll while guiding the thrown suspended mass over and back upon the take-up side of the beatin roll, in a path which increases in distance rom the upper portion of the take-up side of the roll, collecting the traveling suspended mass and turning its direction of travel back toward the take-up side of the roll so that the collected mass is rotated, and discharging the rotating mass into the opposite ends of the circulating mass, at a higher speed than the travel of the circulating mass.

26. The method of beating paper pulp in the presence of a liquid, comprising'circulating the mass through a passage, passing the mass from one end of the passage beneath and upon the take-up side of a beating roll, drivin g the beating roll at such a high speed that the mass is thrown by centrifugal force into the air from the discharge side of the beating roll while guiding the thrown suspended mass over and back upon the take-up side of the beating roll to a point remote from such takeup side, collecting the traveling suspended mass and turning its direction of travel back toward the take-up side of the roll in a manner to rotate the collected mass, and effecting the travel of the rotating mass longitudinally upon its axis of rotation for returning the rotating mass into the opposite end of the circulating mass.

27. The method of beating paper pulp inthe presence of a liquid, comprising circulating the take-up side of a beatm roll, driving the the mass through apassage, from one end 0 the passage beneath and upon beating roll at such a hig speed that the mass is thrown, by centrifu al force into the air from the discharge si e of the beating roll while guiding the thrown suspended mass over and back upon the take-up side of the beating roll, collecting the traveling suspended mass and turning its direction of travel downwardly and then back toward the take-up side of the roll so that the collected mass is rotated, and discharging the rotating mass into the opposite end of the circulating mass.

28. The method of beating paper pulp in the presence of a liquid, comprising circulating the mass through a passage, passing the mass from one end of the passage beneath and upon the take-up side of a beating roll, driving the beating roll at such a high speed that the mass is thrown by centrifugal force into the'air from the discharge side of the beating roll while guiding the'thrown suspended mass over and back u on the take-up side of the beating roll in sue a manner that spaced superposed portions of the mass travel in opposite directions with relation to the beating roll and thereby rotating the collected mass, and discharging the rotating mass into the opposite end of the circulating mass.

29. The method of beating paper pulp in the presence of a liquid, comprising circulating the mass through a passage, passing the mass from one end of the passage beneath and upon the take-up side of the beating roll, driving the beating roll at such a high speed that the mass is thrown by centrifugal force into the air from the discharge side of the beating roll while guiding the thrown suspended mass over and back upon the take-up side of the beating roll, subjecting the traveling suspended mass upon the take-up side of the beating roll to an extracting action, collecting the extracted material, collecting the remaining traveling suspended mass and turning its direction of travel back toward the take-up side of the roll so that such collecting mass is rotated, and discharging the rotating mass into the opposite end of the circulating mass.

30 In the method of beating paper pulp in the presence of a liquid, the steps of suppl ing the liquid mass beneath and upon the ta e-up side of a beating roll, driving the beating roll at such a high speed that the mass is thrown by centrifugal force into the air from the discharge side of the beating roll while guiding the thrown suspended mass over and back upon the take-up side of the beating roll by means of a guide element having extracting openings near its discharge end so that the extracting action occurs while the mass is traveling over such openings, and

passing the mass collecting the remaining portion of the traveling mass. y

31. The method of beating paper pulp in the presence of a liquid, comprising circulating the mass throu h a passage, passing the mass from one emf of the passage beneath and upon the take-up side of the beating roll, driving the beating roll at such a high speed that the mass is thrown by centrifugal force into the air from the discharge side of the beating roll while guiding the thrown suspended mass over and back upon the take-up side of the beating roll, collecting the traveling suspended mass and turning its direction of travel back upon the take-up side of the beating roll so that the collected mass is rotated with its axis of rotation at generally a right angle to the direction of travel of the mass withln the intake end of the circulating passage, and rapidly discharging the rotating mass into the intake end of the circulating passage at generally a right angle to the circulation of the mass therein.

In testimon whereof I afiix my signature.

7 ALTER N. SHERWVOOD. 

